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fix backup IO stats: use /proc/$$/io instead of /proc/self/io

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/proc/self/io inside $(awk ...) resolves to the awk subprocess PID,
not the parent bash shell. Use $$ (bash PID) to read the correct
process IO counters.
This commit is contained in:
Viktor Barzin 2026-03-23 12:33:52 +02:00
parent 0a294a30a6
commit a95d434ff1
6 changed files with 28 additions and 28 deletions
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16
stacks/dbaas/modules/dbaas/main.tf
View file

@ -341,8 +341,8 @@ resource "kubernetes_cron_job_v1" "mysql-backup" {
command = ["/bin/bash", "-c", <<-EOT
set -euxo pipefail
_t0=$(date +%s)
_rb0=$(awk '/^read_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_wb0=$(awk '/^write_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_rb0=$(awk '/^read_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
_wb0=$(awk '/^write_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
export now=$(date +"%Y_%m_%d_%H_%M")
mysqldump --all-databases -u root --host mysql.dbaas.svc.cluster.local | gzip -9 > /backup/dump_$now.sql.gz
@ -353,8 +353,8 @@ resource "kubernetes_cron_job_v1" "mysql-backup" {
find . -name "dump_*.sql" -type f -mtime +14 -delete # clean up old uncompressed
_dur=$(($(date +%s) - _t0))
_rb1=$(awk '/^read_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_wb1=$(awk '/^write_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_rb1=$(awk '/^read_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
_wb1=$(awk '/^write_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
echo "=== Backup IO Stats ==="
echo "duration: $${_dur}s"
echo "read: $(( (_rb1 - _rb0) / 1048576 )) MiB"
@ -1097,8 +1097,8 @@ resource "kubernetes_cron_job_v1" "postgresql-backup" {
command = ["/bin/bash", "-c", <<-EOT
set -euxo pipefail
_t0=$(date +%s)
_rb0=$(awk '/^read_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_wb0=$(awk '/^write_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_rb0=$(awk '/^read_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
_wb0=$(awk '/^write_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
export now=$(date +"%Y_%m_%d_%H_%M")
PGPASSWORD=$PGPASSWORD pg_dumpall -h postgresql.dbaas -U postgres | gzip -9 > /backup/dump_$now.sql.gz
@ -1109,8 +1109,8 @@ resource "kubernetes_cron_job_v1" "postgresql-backup" {
find . -name "dump_*.sql" -type f -mtime +14 -delete # clean up old uncompressed
_dur=$(($(date +%s) - _t0))
_rb1=$(awk '/^read_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_wb1=$(awk '/^write_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_rb1=$(awk '/^read_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
_wb1=$(awk '/^write_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
echo "=== Backup IO Stats ==="
echo "duration: $${_dur}s"
echo "read: $(( (_rb1 - _rb0) / 1048576 )) MiB"

8
stacks/immich/main.tf
View file

@ -685,8 +685,8 @@ resource "kubernetes_cron_job_v1" "postgresql-backup" {
image = "postgres:16.4-bullseye"
command = ["/bin/sh", "-c", <<-EOT
_t0=$(date +%s)
_rb0=$(awk '/^read_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_wb0=$(awk '/^write_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_rb0=$(awk '/^read_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
_wb0=$(awk '/^write_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
export now=$(date +"%Y_%m_%d_%H_%M")
pg_dumpall -h immich-postgresql -U immich > /backup/dump_$now.sql
@ -696,8 +696,8 @@ resource "kubernetes_cron_job_v1" "postgresql-backup" {
find . -name "dump_*.sql" -type f -mtime +14 -delete # 14 day retention of backups
_dur=$(($(date +%s) - _t0))
_rb1=$(awk '/^read_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_wb1=$(awk '/^write_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_rb1=$(awk '/^read_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
_wb1=$(awk '/^write_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
echo "=== Backup IO Stats ==="
echo "duration: $${_dur}s"
echo "read: $(( (_rb1 - _rb0) / 1048576 )) MiB"

8
stacks/infra-maintenance/modules/infra-maintenance/main.tf
View file

@ -105,8 +105,8 @@ resource "kubernetes_cron_job_v1" "backup-etcd" {
args = [<<-EOT
set -eu
_t0=$(date +%s)
_rb0=$(awk '/^read_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_wb0=$(awk '/^write_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_rb0=$(awk '/^read_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
_wb0=$(awk '/^write_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
TIMESTAMP=$(date +%Y%m%d-%H%M%S)
ETCDCTL_API=3 etcdctl \
@ -117,8 +117,8 @@ resource "kubernetes_cron_job_v1" "backup-etcd" {
snapshot save /backup/etcd-snapshot-$TIMESTAMP.db
_dur=$(($(date +%s) - _t0))
_rb1=$(awk '/^read_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_wb1=$(awk '/^write_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_rb1=$(awk '/^read_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
_wb1=$(awk '/^write_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
echo "=== Backup IO Stats ==="
echo "duration: $${_dur}s"
echo "read: $(( (_rb1 - _rb0) / 1048576 )) MiB"

8
stacks/redis/modules/redis/main.tf
View file

@ -284,8 +284,8 @@ resource "kubernetes_cron_job_v1" "redis-backup" {
command = ["/bin/sh", "-c", <<-EOT
set -eux
_t0=$(date +%s)
_rb0=$(awk '/^read_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_wb0=$(awk '/^write_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_rb0=$(awk '/^read_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
_wb0=$(awk '/^write_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
TIMESTAMP=$(date +%Y%m%d-%H%M)
# Trigger a fresh RDB save on the master
@ -297,8 +297,8 @@ resource "kubernetes_cron_job_v1" "redis-backup" {
find /backup -name 'redis-*.rdb' -type f -mtime +28 -delete
_dur=$(($(date +%s) - _t0))
_rb1=$(awk '/^read_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_wb1=$(awk '/^write_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_rb1=$(awk '/^read_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
_wb1=$(awk '/^write_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
echo "=== Backup IO Stats ==="
echo "duration: $${_dur}s"
echo "read: $(( (_rb1 - _rb0) / 1048576 )) MiB"

8
stacks/vault/main.tf
View file

@ -267,8 +267,8 @@ resource "kubernetes_cron_job_v1" "vault_backup" {
args = [join("", [
"set -eu; ",
"_t0=$(date +%s); ",
"_rb0=$(awk '/^read_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0); ",
"_wb0=$(awk '/^write_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0); ",
"_rb0=$(awk '/^read_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0); ",
"_wb0=$(awk '/^write_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0); ",
"export VAULT_ADDR=http://vault-active.vault.svc.cluster.local:8200 && ",
"export VAULT_TOKEN=$(cat /vault/token/vault-root-token) && ",
"TIMESTAMP=$(date +%Y%m%d-%H%M%S) && ",
@ -276,8 +276,8 @@ resource "kubernetes_cron_job_v1" "vault_backup" {
"find /backup -name '*.db' -mtime +30 -delete && ",
"echo \"Backup done: vault-raft-$TIMESTAMP.db\" && ls -lh /backup/ && ",
"_dur=$(( $(date +%s) - _t0 )); ",
"_rb1=$(awk '/^read_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0); ",
"_wb1=$(awk '/^write_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0); ",
"_rb1=$(awk '/^read_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0); ",
"_wb1=$(awk '/^write_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0); ",
"echo '=== Backup IO Stats ==='; ",
"echo \"duration: $${_dur}s\"; ",
"echo \"read: $(( (_rb1 - _rb0) / 1048576 )) MiB\"; ",

8
stacks/vaultwarden/modules/vaultwarden/main.tf
View file

@ -248,8 +248,8 @@ resource "kubernetes_cron_job_v1" "vaultwarden-backup" {
set -euxo pipefail
apk add --no-cache sqlite
_t0=$(date +%s)
_rb0=$(awk '/^read_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_wb0=$(awk '/^write_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_rb0=$(awk '/^read_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
_wb0=$(awk '/^write_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
now=$(date +"%Y_%m_%d_%H_%M")
# Pre-flight: verify source DB is healthy before backing up
@ -275,8 +275,8 @@ resource "kubernetes_cron_job_v1" "vaultwarden-backup" {
find /backup -maxdepth 1 -mindepth 1 -type d -mtime +30 -exec rm -rf {} +
_dur=$(($(date +%s) - _t0))
_rb1=$(awk '/^read_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_wb1=$(awk '/^write_bytes/{print $2}' /proc/self/io 2>/dev/null || echo 0)
_rb1=$(awk '/^read_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
_wb1=$(awk '/^write_bytes/{print $2}' /proc/$$/io 2>/dev/null || echo 0)
echo "=== Backup IO Stats ==="
echo "duration: $${_dur}s"
echo "read: $(( (_rb1 - _rb0) / 1048576 )) MiB"